If I were to make a rating of 1-10. I'd put Chris Martin at 1, someone like Ganguly at 4, Laxman at 5, Dravid at 7, Ponting at 8, Tendulkar around 9, Bradman at 10. Of course, as SJS mentioned, you have guys like Hobbs and Sobers, who I'd consider better than Tendulkar but obviously not as good as Bradman, and I'm not sure how to rate them without going into fractions. I wouldn't want to make them a 9, because then if I make Tendulkar an 8, then we have some really good players at 7, and Dravid type guys at 6. 6 would be too low for Dravid IMO, because that's merely slightly above average.
On the other hand, I am thinking way too much about this.